If you think that the powers-that-be will NOT put or not think of putting, a weapon onboard, you are low on oxygen. Mission or not!
Had you read the article you would have learned the EQ/RQ-180 has remote weapons like hyper-sonic missiles launched from ships thousands of miles away which can target hostiles before they know they are targeted.
Few, if any, ELINT/SIGINT aerial assents have defensive missiles or weapons - mostly they have jammers and flares. Their survivability on the battlefield is sometimes measured in minutes or seconds. For instance, during the Cold War in Germany, helicopters had a life expectancy of 15 seconds in combat.